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【单选题】
执行语句序列ofstream outf(“SALARY.DAT”)；if(...)cout<<“成功”；else cout<<“失败”；后，如文件打开成功，显示”成功”，否则显示”失败”.由此可知，上面if语句的条件表是：A.
!outf 或者 outf.fail()
B.
!outf 或者 outf.good()
C.
outf 或者 outf.fail()
D.
outf 或者 outf.good()
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举一反三
【单选题】What made a lot of large animals disappear in the past?
A.
Original vegetation cut down or burned.
B.
Habitats fragmenting and animals homeless.
C.
Hunting unchecked and without supervision.
D.
Mining, logging ,and energy exploration.
【单选题】What is the worst thing about the job of a sales representative?
A.
He must see a lot of customers.
B.
He has to do a lot of research.
C.
He has to be away from home a lot.
D.
None of the above.
【单选题】已知有以下定义: int i = 0; const int ic = 32; int *const p1 = &i; const int *p2; const int *const p3 = 以下说法错误的是________。
A.
p1为顶层const
B.
p2为顶层const
C.
p3为项层const
D.
(*p3)为底层const
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